Making waxed paper.



A. W. HARRINGTON.

MAKING 'WAXED PAPER. APPLIUATION FILED NOV. 28, 1905.

- Patented June 3, 1913.

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INVENTOR WITNESSES A TTOHNEVS aM/vn we. wen/w;

ALEXANDER..W. HARRINGTON, or BRooKLYN; NEW YORK, ASSIGNOR To A. w. HAIR- BINGTON cor/tram, or ew YORK, N. Y., A GOPARTNERSHIP.

' MAKING WAXED PAPER.

Specification of Letters Patent.

Patented'June3, 1l91l3.

Application filed November 28, 1905. Serial No. 289,458.

RINGTON, a citizen of the United States, and

a resident of Brooklyn, in the county of Kings and State of New- York, have invented new and useful Improvements in Making Waxed Paper; "and in order that those skilled in the art may understand and practise my invention I 'glv'e the following specification.

My invention relates to the manufacture of waxed paper and hasfor its object the production of waxed paper in a more expeditious manner and with greater economy of time and material, than has, so far as I am aware, been accomplished.

A further object of my invention is to produce a waxed paper which has the property of drying almost immediately after the application of the waxing composition, whereby the tedious and expensive drying or hardening operation of the wax is el1m1- nated. v

A further object of the invention is to produce waxed paper of superior quality and increased strength.

My invention enables Waxed paper to be made in the'ordinary process of manufacture of paper from the stock by Fourdrinier or cylinder paper making machines, without interruption in the process, the product from such machines in this case being waxed paper.

In order that my invention may be better understood, I have illustrated the same in the accompanying drawing in which Figure 1 represents more or less diagrammatically the drier rolls of a paper making machine, the waxing tank, the calenders and the reel. Fig. 2 represents a modification of my invention.

Referring to Fig. 1, 1 indicates the first drier rolls of a paper making machine; 2

indicates the paper web; 3 indicates the waxing tank; 4. indicates the second driers; 5 the calenders and 6 the reel. The second set of driers and the calenders are indicated in dotted lines for the reason that either or both may be omit-ted and the paper led from the waxing devices directly to the reel.

if desired.

From the above it will be seen that the waxing devices form an integral part of a paper making machine, and that my invention results in the continuous production of of my invention, since it renders the wax- 111g of paper as a separate and distinct process applied tofinished, manufactured paper unnecessary, thereby saving considerable time, labor and expense.

The detailed. construction of the waxing tank is as follows: The paper web 2 is led from the driers 1 under a guide roll 7 journa'led near the edge of the waxing tank,'and from said roll 7 to a heated roll '8 aroundsaid heated roll 8 and between-the same ,and the second heated roll 9, around the latter to the second set of drier rolls 4, thence to the calender-s5 and-finally to the roll 6. In case 1t is not desired to give a calendered finish to the paper, the calenders .5 maybe omitted. The second set of driers would in this" case in practice be unnecessary, and they may be omitted also, slnce the principal object of said second driers is to insure the even distribution of the waxing on the surface of the paper preparatory topassing through the calenders, it being well understood in the art that prior to passing through the calenders, the paper must be free from irregularities and unevennesses.

Thus, if desired, the waxed paper may be led directly to the reel. The tank 3 is provided with hollow walls in the spaces of which pass steam or heating pipes 10 and heating pipes 10 may also be arranged in the waxing fluid receptacle 11 of the tank. The heated roll S dips well below the surface of the waxing composition in the-tank, so that the paper web 2 is carried Well down into the lower portion of the fluid. The

paper is led between the rolls 8 and 9 which exert a squeezing action upon the paper to press out excess of the waxing material. Other pressing rolls 14 and 15 may be provided if necessary. A supply tank 15 is alsoprovided for a purpose explained below.

The Waxing fluid forms an important feature of the invention, and has approximately the following composition, viz: glutinous material 00 parts, glycerin or similar oily fluid 1/800 of a part, paraffin wax 115 parts, water 300 parts, or more, according to the consistency of fluid required and the character of the coating desired.

The above materials are to be mixed together and any suitable quantity of the composition may be made up with the ingredients present in substantially the proportions given. For the glutinous matter specified such materials as gum arabic, starch, or by product of rubber-making may be employed- A small proportion of bees wax may be added to the composition if desired to increase the hardness and finish of the surface and to increase the waterproof properties of the coating. A small proportion of alcohol may be added to hasten the drying when required.

The. several ingredients are mixed together with the application of heat and when the same is to be used, it is placed in the waxing tank and maintained at a temperature of about 212 F. or above. In

the waxing tank the waxy ingredients of the composition remain ,at the'surface of the fluid and form a relatively thin layer on the top. The lutinous material remains below as indicated in Fig.1 of the drawing, where 13 represents the waxy constituents or materials and 12 the glutinous materials of the composition.

In applying the composition to the paper to be coated, the paper is led into, and passes through, the glutinous portion of the composition in the lower part of the tank, so

that its pores and interfibrous spaces become filled with the glutinous material. {Any small portion of wax which may adhere to the web in passing into the glutinous portion of the fluid isimmediately melted oif on cominginto the heated, lower portion of the fluid. In its passage through the lower portion of the fluid, the paper takes up and absorbs and has its pores and interfibrous i 'with thehot glutinous composition. Inthis spaces filled with the glutinous "composition. This composition gives strength, density, closeness of texture and weight to the paper. Orr -passing upward 'out of the fluid, the paper so filled receives a coating of wax from the waxy ingredients at the surface of I condition the paper immediately passes,

without cooling, to the waxing composition with which 1t becomes superficially coated.

Both the glutinous composition filling the pores and interstices of the paper and the waxing composition immediately applied thereto being heated, and both being applied in practically one coatin operation, there results a union between the waxing composition and the glutinous composition whereby the glutinous composition merges, into the waxy film or coating at the surface of the paper. The waxy coating is therefore much less liable to crack, separate or flake off than where a wax coating is applied to paper as a separate operation. Furthermore the amount of wax required to form a coating is considerably reduced, which not only effects an economy n the amount required .to coat a given surface of paper but'also reface. From the calenders, the paper passes directly to the reel. It will thus be seen that according to myinvention, the process 'at approximately the temperature of the fluid in the coating tank.

In Fig. 2, I have shown a modification of the invention in which the coating tank is, shown a as having two divisions. In the first division .16 of which is placed the glutinous ingredients of. the composition and in the second. division 17 of which is placed the :waxy ingredients. The paper passes first into the portion 16 of the tank whereits pores become filled with the glutinous portion of the composition, and ,thence passes into the division 117 of the tank in which it is coated with the waxy ingredients. It will be understood that the tank in this case is heated and kept at the proper temperature in a manner similar to the one shown in Fig. 1. As a result of my invention, the coated paper dries almost immediately after co at ing and no tedious and cumbrous processes and appliances are required for drying or setting the waxed coating and the paper may be led directly to the reel if desired. My invention not only results in' an improvement in the process of making waxed paper, but an improved waxed paper of increased strength, nd closeness of texture aswell as increased weight.

, Having thus described my invention, what I claim-and desire to protect by Letters Patent is:

l. The process of treating paper which 1,063,441 I at consists in first immersing the paper in a heated glutinous fluid composition to fill the pores and interstices of the paper therewith and bind the fibers together more firmly, then as the paper is withdrawn from said heated fluid composition while the same is still hot applying to the paper so treated a waxy composition, whereby the heat of the glutinous composition assists in the distribution and spreading of the waxy composition, and the latter becomes united with the glutinous composition in the pores of the paper.

2. The process of treating paper which consists in floating a waxy composition upon the heated glutinous composition, leading the paper to be treated into the heated glutinous composition to fill the pores and interstices of the paper therewith, and Withdrawing said paper from said glutinous composition through the superimposed waxy composition, whereby the latter becomes united with the glutinous composition filling the pores of the paper and forms a superficial coating on the paper.

3. The process of making waxed paper 25 in a continuous operation which consists in' first leading the paper into and through a heated liquid composition comprising a glutinous material and glycerin to fill the pores and interstices thereof immediately 30 ALEXANDER W. HARRINGTON.

\Vitnesses:

E. W. HOWELL, WM. P. HAMMOND. 

